If you decide to downgrade, you shouldn't just pick a random date. Here are the specific releases users typically seek out:
As the web evolves, older versions struggle to render modern sites correctly, leading to "borderline unusable" experiences on sites like YouTube or Reddit. Where to Find the "Old Guard" waterfox browser old version
If you are determined to run an old version of Waterfox, you must accept the security implications. If you decide to downgrade, you shouldn't just
Classic is famous for supporting XUL and XPCOM add-ons that Firefox abandoned after version 57. If you decide to downgrade